Key-duplicating machine



v S. SEGAL.

KEY DUPLICATING MACHINE. 'APPLIQATION FILED MAYZO, 1919.

1,335,351. Patented Mar.30,1920.

2 SHEETS--SHEET 1.

ATTORNEY5.

S. SEGAL.

KEY DUPLICATING MACHINE,

APPLICATION FlLEDf MAY 20,"1919.

Patented Mar. 30, 1920.

2 SHEETS-SHEET 2.

7M ATTORNEY.

has I r SAMUEI: SEGAL, OF NEW YQRK, N. Y.

KEY-DUPLIGATING MACHINE.

Specification of Letters Patent. Patented Mar. 30,. 192% Application filed May 20, 1919. Serial No. 298,372.

To all whom may concern."

Be it known that l, SAMUEL SEGAL, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Key- Duplicating Machines, of which the following is a specification. I

' My invention relates to key-duplicating machines and has for its object the produ ction of a machine of extreme simplicity of construction which shall be adapted to duplicate keys for cylinder-"locka-as the wellknown Yale keys, as well as to duplicate keys having rectangular teeth on the biting edge, thereof or what is known as flat keys. v I

Other and further objects of the invention will appear from the following description, the invention consisting in the novel parts and combinations of parts hereinafter more particularly described and then specified in the claims.

In the accompanying drawings:

Figure 1 is a plan view of my improved' key-duplicating machine showing the carriage with its work-holding clamps swung up manually in position to duplicate a key for cylinder locks.

Fig. 2 is a vertical cross-section on the line 22 of Fig. 1.

Fig. 3 is a front elevation of my im. proved machine.

Fig. 4 is a plan View of my improved machine showing the carriage and work-hold ing clamps in the proper position for duplieating a flat key.

Referring more particularly to the several figures of the drawing:

10 indicates the base of my improved machine which is provided with a body portion 11 having side plates 12 carryingthe rod 13 connecting said side plates together. li indicates the carriage of the machine which is horizontally slidably mounted on the rod 13. Said carriage is provided with the arms 15 extending outwardly therefrom and with one-piece work-holding clamps 16 and 16 preferably integral with said arms. The said work-holding clamps are ring-shaped and have enlarged heads with slots 17 out therethrough forming two flat opposed surfaces or jaws adapted to hold therebetween a. key in clamped position. Each of said work-holding clamps is also provided. with a shoulder or flange 18 the slotted heads together when the nuts are turned in one direction or to allow them to :move away from each other due to the spring action in the metal of the-clamps, when the nuts are turned in the other direction, in an obvious manner.

The work-holding clamps l6 and 16 are identical in size and construction, the said clamp 16 being adapted to hold and clampa master key 22 between the jaws thereof and the clamp 16 a key blank 22 to be duplicated and as illustrated. The keys are properly positioned in their respective clamps by seating the back edges thereof on the shoulders or flanges 18 of the clamps so that the biting edges of the keys extend outwardly from the clamps, the proper horizontal positions of the keys in their respective clamps being determined by engagement of the shoulders 23, 23 of the keys with the flat sides of the pivoted hooks or latches 19.

24: indicates a guiding finger suitably mounted in a post 25 extending upwardly from the body of the machine and held in said post by pins 26 or other suitable means. The outer edge of said guiding finger is beveled as illustrated and is adapted to engage the notches in the biting edge of a cylinder lock key. .27 indicates a guiding finger mounted in a post 28 similar in construction to the post 25. The said guiding finger 27 is held in mounted position by suitable pins 26 as shown and the outer edge of the finger is flat or squared and is adapted to engage or fit within the indentations intermediate the rectangular teeth of a flat key, as for instance the indentations 29 of the key 30 shown in Fig. 45, the key blank 30 being adapted to have similar indentations cut therein as will be described.

31 indicates a double standard extending of the guiding finger 24. 37 indicates a rotary cutting tool of a width equal to the width of the guidin finger 27 and provided with a saw-tooth edge as illustrated. The distances between the centers of the clamps 16, 16', the guiding finger 24 and rotary cutting tool 36 and the guiding finger 27 and rotary cutting tool 37 are equal. Moreover, the 'outer edges or the edges nearest the clamps of the guiding fingers 2a and 27 and the rotary cutting tools 36 and 37 lie in the'same horizontal-plane.

The duplicating operation is as follows:

Assuming a key for a cylinder lock is to be duplicated, the master key is properly positioned in clamp 16 and the key blank in' clamp 16as shown in Fig. 3 and as has been. explained. The wheel 34 is then operated to rotate the cutting tool 36 and the carriage is swung up manually on the rod 13 (see Fig. l) to cause either end of the biting edge of the master key to be pressed against the guiding finger 24. The carriage is moved slowly and horizontally along the rod 13, contact at all times being preferably kept between the'biting edge of the master key and the guidin finger 24. The forward movement of the carriage toward the guiding finger is limited by the depth of each notch or cut in the biting edge of the master key and a notch or cut of equal, depth will be made in the edge on the key blank by the cutting tool 36 as is obvious.

In duplicating a flat key, the carriage is swung to the left on rod 13 until clamp 16 is in vertical alinement with the guiding finger 27 and clamp 16' with the rotary cutter 87 (see Fig. 4). The master key and key blank are properly positioned in their respective clamps and by rotation of shaft 32 and-successive engagement of the guiding finger 27 with each indentation 29 of the master key, similar indentations are cut in the biting edge of the key blank 30, as will be manifest, by the cutting tool 37 lVhat I claim as my invention is 1. In a key-duplicating machine, a pair of work-holding clamps for holding and clamping a master key and key blank, a guiding finger anda cutting tool adapted to cooperate respectively with said work-holding clamps and a second guiding finger and cutting tool adapted to also coiiperate respectively with said work-holding clamps.

2. In a key-duplicating machine, a carriage, a pair of work-holding clamps secured to said carriage and adapted to hold and clamp a master key and key blank,'a guiding finger adapted to engage the notches in the biting edgeof a key of the cylinder lock type when said key is held in one of said work-holding clamps, a cutting tool adapted to duplicate from a key blank held in the other clamp the master key of the cylinder lock type, a second guiding finger adapted to engage the teeth of a flat master key when said key is held in one of said work-holding clamps and a second cutting tool adapted to duplicate from a key blank held in the other clamp the flat master key.

3. In a key-duplicating machine, a horizontally slidable carriage mounted on said machine, a pair of work-holding clamps secured to said carriage and adapted to hold and clamp a master key and key blank, a pair of guiding fingers extending from the machine, and a pair of cutting tools mounted on the machine, the first of said guiding fingers and said cutting tools or the second of said guiding fingers and said cutting tools being adapted to engage a master key and key blank ,held by said work-holding clamps.

4. In a key-duplicating machine, a carriage mounted on said machine and adapted to be moved horizontally thereof, a pair of work-holding clamps secured to said carriage and adapted to hold and clamp a master key and key blank, a pair of guiding fingers independently mounted on the machine, a shaft j ournaled in a suitable standard and a pair of rotary cutting tools mounted on said shaft.

5. In a key-duplicating machine, a carriage mounted on said machine and adapted to slide horizontally thereof, a pair of workholding clamps secured to .said carriage and adapted to hold and clamp a masterkey and key blank, a pair of guiding fingers adapted to engage the biting edge of the key blank, a pair of guiding fingers independently mounted on the machine and adapted to engage the biting edge of the master key, a shaft journaled-in a suitable standard and a pair of cutting tools mounted on said shaft and adapted to engage the biting edge of the key blank.

7. In a key-duplicating machine, a carriage mounted on said machine, a pair of work-holding clamps secured to said carriage and adapted to hold a master key and key blank, a guiding finger having a beveled edge adapted to engage the notches-in the biting edge of a master key when held in its clamp, a cutting tool having a beveled edge adapted to duplicate the notches of the master key in the biting edge of a key blank 7 when held in its clamp and when the guiding finger engages the biting edge of the master key, a second guiding finger having a flat edge adapted to engage the teeth of a master key When heLd in its clamp and a second cutting tool having a saw-tooth edge adapted to duplicate the teeth of the master key in the biting edge of a key bla'nk when held in its clamp and when the guiding finger with the flat edge engages the teeth 0t 10 the master key. Signed at hew York, in the county of New York and State of New York, this 17th day of Mziy A. D. 1919. I

SAMUEL SEGAL. Witnesses F. B. TOWNSEND, IRENE Lnrnowmz. 

